post https://api-ext.getsigneasy.com/v1/files/original/
Import or upload a new document into SignEasy to open it for signing (either yourself or requesting signatures). The file can be gzip compressed and uploaded to speed up the upload. Make sure you set the Content-Encoding header as gzip for the server to recognize the compression. If you do not pass any Content-Encoding header, the server assumes an uncompressed file upload.